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Time-course analysis of FeIFNβ expression in crude S. frugiperda larval extracts. a Antiviral activity against vesicular stomatitis virus. Circle: FeIFNβ larval extracts. Triangle: negative control larval extracts (larvae infected with a non-related baculovirus). b Western blot analysis of the expression kinetics of FeIFNβ. MK: molecular weight marker, 3–6 days: 3–6 post-infection
